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A Graphical Method for the Estimation of Radiation Hazards from a Crowded Multiple Antenna Site

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The major objective of the design of safe crowded transmitting antenna sites is not only to determine a safe zone around each individual antenna; rather, to establish safety areas at the antenna site itself, as well as, at the neighboring areas. The
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  1 3 rd   Workshop on Biological Effects of EMF  EMC EMC Engineering Engineering and Safetyand Safety  A GRAPHICAL MEH!" F!R HE E#IMAI!$ !F  RA"IAI!$ HA%AR"# FR!M A CR!W"E" M&LIPLE A$E$$A #IE    3 rd   Workshop on Biological Effects of  EMF '() !cto*er +,,' Moshe %- $et.er/ A0i #hechter/ %0i 1arni   2 3 rd   Workshop on Biological Effects of EMF  EMC EMC Engineering Engineering and Safetyand Safety Safety Distance from a Single Transmitter – Required Data • rans2itters technical para2eters/rans2itters technical para2eters/ •  Antennas technical para2eters/  Antennas technical para2eters/ •  Antenna deplo42ent details5 heights/  Antenna deplo42ent details5 heights/ *oresight directions/ scanning angles/ *oresight directions/ scanning angles/ •  PELs to personnel/ ordnance/ and f6el  PELs to personnel/ ordnance/ and f6el  •  #afet4 2argin 7if re86ired9/ #afet4 2argin 7if re86ired9/ •  Blockage of line of sight *et:een ;  Blockage of line of sight *et:een ; antennas and test pointsantennas and test points  3 3 rd   Workshop on Biological Effects of EMF  EMC EMC Engineering Engineering and Safetyand Safety HE C!MP&AI!$AL  ALG!RIHM 7<9 For Safety: Where:Where:•  E  1 ,  E  2 ,…,  E   N  , measured/calculated field strength at f  1 ,  f  2 ,…,  f   N  , respectively•  Es 1 ,  Es 2 ,…,  Es  N   are the standard exposure levels at f  1 ,  f  2 ,…,  f   N  , respectively  4 3 rd   Workshop on Biological Effects of EMF  EMC EMC Engineering Engineering and Safetyand Safety Safety Distance from a Single Transmitter (Far-Field)  R7     /    9  = (  P   G  ,  G   #L 7       /      9    =    4 π  PEL    9 <=+  , [ 2 ] Where:Where:  P  P   D D    !o"er #ensity $W/m !o"er #ensity $W/m 22 %%  PEL PEL   !ermissi&le 'xposure (imit $W/m !ermissi&le 'xposure (imit $W/m 22 %%  R R   #istance from )ntenna "here ! #istance from )ntenna "here ! ## !'(!'(  P  P  T T     )verage *+ !o"er $Watt% )verage *+ !o"er $Watt% GG 00   )ntenna ain )ntenna ain  P   "  =  P   G  ,  G   #L  , [ W  / 2 2 ] 4 π  R 2   3 rd   Workshop on Biological Effects of EMF  EMC EMC Engineering Engineering and Safetyand Safety Safety Distance from a Single Transmitter (Antenna Pattern)   TYPE OF !TE! "#$T$O! PTTE"!   %$!   &erti'a Per)*e'ti+e  14 d. 2 d. to  d.
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